I downloaded Iregatta onto my iphone4 last week after seeing your post and tried it last Sunday on a 50km race. I put it in an old GPS drybag and that didn't work too well as the screen was difficult to see due to so many marks on the bag and we were out of phone range so no data. On the upside we were able to hear music with the phone laying on the tramp quite loudly while we were going downwind.